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- 补充 支持 ManyToMany 导航属性子查询 ToList；

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This commit is contained in:
2881099
2020-12-25 14:31:57 +08:00
parent cea2441236
commit 89fa0dc9f6
4 changed files with 172 additions and 198 deletions
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34
FreeSql/Internal/CommonExpression.cs
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@ -700,6 +700,7 @@ namespace FreeSql.Internal
static ConcurrentDictionary<Type, ConcurrentDictionary<string, bool>> _dicMethodExistsExpressionCallAttribute = new ConcurrentDictionary<Type, ConcurrentDictionary<string, bool>>();
static ConcurrentDictionary<Type, FieldInfo[]> _dicTypeExpressionCallClassContextFields = new ConcurrentDictionary<Type, FieldInfo[]>();
static ThreadLocal<List<BaseDiyMemberExpression>> _subSelectParentDiyMemExps = new ThreadLocal<List<BaseDiyMemberExpression>>(); //子查询的所有父自定义查询，比如分组之后的子查询
static ConcurrentDictionary<Type, MethodInfo> _dicSelectMethodToSql = new ConcurrentDictionary<Type, MethodInfo>();
public string ExpressionLambdaToSql(Expression exp, ExpTSC tsc)
{
if (exp == null) return "";
@ -1161,16 +1162,16 @@ namespace FreeSql.Internal
if (mn == 0) fsqlManyWhereExp = tmpExp;
else fsqlManyWhereExp = Expression.AndAlso(fsqlManyWhereExp, tmpExp);
}
fsqltables.Add(new SelectTableInfo { Alias = manySubSelectWhereParam.Name, Parameter = manySubSelectWhereParam, Table = manyTb, Type = SelectTableInfoType.Parent });
fsqlWhere.Invoke(fsql, new object[] { Expression.Lambda(fsqlManyWhereExp, fsqlWhereParam) });
var sql2 = fsqlType.GetMethod("ToSql", new Type[] { typeof(string) })?.Invoke(fsql, new object[] { "1" })?.ToString();
if (string.IsNullOrEmpty(sql2) == false)
manySubSelectExpBoy = Expression.Call(manySubSelectExpBoy, manySubSelectWhereSql, Expression.Constant($"exists({sql2.Replace(" \r\n", " \r\n ")})"), Expression.Constant(null));
MethodInfo manySubSelectAggMethod = null;
switch (exp3.Method.Name) //https://github.com/dotnetcore/FreeSql/issues/362
{
case "Any":
case "Count":
fsqltables.Add(new SelectTableInfo { Alias = manySubSelectWhereParam.Name, Parameter = manySubSelectWhereParam, Table = manyTb, Type = SelectTableInfoType.Parent });
fsqlWhere.Invoke(fsql, new object[] { Expression.Lambda(fsqlManyWhereExp, fsqlWhereParam) });
var sql2 = fsqlType.GetMethod("ToSql", new Type[] { typeof(string) })?.Invoke(fsql, new object[] { "1" })?.ToString();
if (string.IsNullOrEmpty(sql2) == false)
manySubSelectExpBoy = Expression.Call(manySubSelectExpBoy, manySubSelectWhereSql, Expression.Constant($"exists({sql2.Replace(" \r\n", " \r\n ")})"), Expression.Constant(null));
manySubSelectAggMethod = _dicExpressionLambdaToSqlAsSelectAggMethodInfo.GetOrAdd(parm123Ref.RefMiddleEntityType, _ => new ConcurrentDictionary<string, MethodInfo>()).GetOrAdd(exp3.Method.Name, exp3MethodName =>
typeof(ISelect0<,>).MakeGenericType(typeof(ISelect<>).MakeGenericType(parm123Ref.RefMiddleEntityType), parm123Ref.RefMiddleEntityType).GetMethod(exp3MethodName, new Type[0]));
manySubSelectExpBoy = Expression.Call(manySubSelectExpBoy, manySubSelectAggMethod);
@ -1182,7 +1183,28 @@ namespace FreeSql.Internal
case "ToList":
case "ToOne":
case "First":
throw new ArgumentException($"ManyToMany 导航属性 .AsSelect() 暂时不可用于 Sum/Avg/Max/Min/First/ToOne/ToList 方法");
//解析：string.Join(",", w.Roles.AsSelect().ToList(b => b.RoleName)
var exp3Args0 = (exp3.Arguments[0] as UnaryExpression)?.Operand as LambdaExpression;
manySubSelectAggMethod = _dicSelectMethodToSql.GetOrAdd(fsqlType, fsqlType2 =>
fsqlType2.GetMethods().Where(a => a.Name == "ToSql" && a.GetParameters().Length == 2 && a.GetParameters()[1].ParameterType == typeof(FieldAliasOptions) && a.GetGenericArguments().Length == 1).FirstOrDefault());
if (manySubSelectAggMethod == null || exp3Args0 == null) throw new ArgumentException($"ManyToMany 导航属性 .AsSelect() 暂时不可用于 Sum/Avg/Max/Min/First/ToOne/ToList 方法");
manySubSelectAggMethod = manySubSelectAggMethod.MakeGenericMethod(exp3Args0.ReturnType);
var fsqls0p = fsql as Select0Provider;
var fsqls0pWhere = fsqls0p._where.ToString();
fsqls0p._where.Clear();
var fsqltablesLast = new SelectTableInfo { Alias = manySubSelectWhereParam.Name, Parameter = manySubSelectWhereParam, Table = manyTb, Type = SelectTableInfoType.InnerJoin };
fsqltables.Add(fsqltablesLast);
fsqlWhere.Invoke(fsql, new object[] { Expression.Lambda(fsqlManyWhereExp, fsqlWhereParam) });
fsqltablesLast.NavigateCondition = fsqls0p._where.ToString();
if (fsqltablesLast.NavigateCondition.StartsWith(" AND (")) fsqltablesLast.NavigateCondition = fsqltablesLast.NavigateCondition.Substring(6, fsqltablesLast.NavigateCondition.Length - 7);
fsqls0p._where.Clear().Append(fsqls0pWhere);
var tsc3 = tsc.CloneDisableDiyParse();
tsc3._tables = tsc._tables.ToList();
var where2 = ExpressionLambdaToSql(Expression.Lambda(manySubSelectWhereExp, manySubSelectWhereParam), tsc3);
if (string.IsNullOrEmpty(where2) == false) fsqls0p._where.Append(" AND (").Append(where2).Append(")");
var sql3 = manySubSelectAggMethod.Invoke(fsql, new object[] { exp3Args0, FieldAliasOptions.AsProperty }) as string;
asSelectBefores.Clear();
return $"({sql3.Replace(" \r\n", " \r\n ")})";
}
asSelectBefores.Clear();
return ExpressionLambdaToSql(manySubSelectExpBoy, tsc);